212211420 has 48 divisors (see below), whose sum is σ = 595553280. Its totient is φ = 56460096.

The previous prime is 212211397. The next prime is 212211421. The reversal of 212211420 is 24112212.

212211420 = T₁₅₉ + T₁₆₀ + ... + T₁₀₈₄.

212211420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212211420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23961 + ... + 31599.

It is an arithmetic number, because the mean of its divisors is an integer number (12407360).

Almost surely, 2^212211420 is an apocalyptic number.

212211420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211420 is an abundant number, since it is smaller than the sum of its proper divisors (383341860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212211420 is a wasteful number, since it uses less digits than its factorization.

212211420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114 (or 8112 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212211420 is about 14567.4781619881. The cubic root of 212211420 is about 596.4713438811.

Adding to 212211420 its reverse (24112212), we get a palindrome (236323632).

The spelling of 212211420 in words is "two hundred twelve million, two hundred eleven thousand, four hundred twenty".